Metal spraying device



Jan. 8, 1935.- sc ET AL 1,987,016

METAL S PRAYI NG DEVI C E Filed Aug. 29, 1932 INVENTOPS:

RUDOLPH L ENSCH, H Labs manufactured, and easier'handled device.

Patented Jan. 8, 1935 PATENT {OFFICE 1,987,016 METAL SPBAYING DEVICE Rudolph Lensch and Paul Leder, Los Angeles,

Calif Application August 29, 1932, Serial No. 630,795

8 Claims.

This invention relates to devices used in applying a coating or surfacing of metal or the like material to otherwise or by their own nature less .substantial bodies or objects.

One of the objects of this invention is to' provide a simplified, durable, dependable, easier Another object is to provide a device designed to avoid and eliminate operating troubles that may occur in other devices.

Another object is to make it impossible that chips or particles of materials handled in or through the device may'enter the operating mechanisms and thereby clog them or prevent their proper operation.

I Another object is to provide a more handy and secure device in encasing and mounting the supply connections and distributions throughout the device.

Other objects will appear from the following description and appended claims as well as from the accompanying drawing, inwhich- Fig. 1 is a top plan view of a simple device designed to operate according to our invention,

having the cover plate of the gear housing in openposition.

Fig. 2 is a side elevation of the device shown in Fig. 1, having parts cut or broken away to show inside or other parts further behind the parts that are left off.

As illustrated in the drawing in Fig. 2, the

. handle 3 is partly broken away to show inside at 13 and at the other end into the upper-end of the handle as indicated at 1'4. Gases, such as acetylene and oxygen, are pref- 'erably brought together at an early moment to become thoroughly mixed before being ignited, but in this improved form of device the mixing chamber 15 is arrangedabove the hand of the operator instead of within the handle as provided in older devices, thereby reducing chances of injury'to the operator's hand by premature explosions or breakage of the handle.

. enter the mechanisms.

The primary gas mixture, formed in the mixingchamber 15 is conducted through'the pipe 16 to the head-inlet 17.

Air, on the other hand, is preferably not mixed with the other gases before reaching the very end of the nozzle 18, and, since a part of the air is also used for the motive force on the propelling mechanism, all the air entering through the connection 6 by way of the control valve 9 is conducted throughout the whole device through airtight conduits, coming from the connection 6, passing through the tube 12, into the intake end 19 of the conduit-system in the housing of the device. 1

One branch 20, controllable by the needle-valve 21' brings a portion of the air to the air driven motor provided 'in the casing-portion 22; while another branch 23 brings the other portion of the air to the air-inlet 24 on the nozzle-head.

As clearly illustrated in Fig. 2, but more particularly and distinctly in Fig. 1, the pipe 12 extends solidly through the handleB and continues in a bend into the inlet 19, there being no possibility of leakage within the handle. I

This arrangement, moreover, provides a desirable bracing of the mechanism-housing 25 between'the handle 3, the branched pipes 12 and 16, and the nozzle-head 26.

Furthermore, the pipes being spaced in this manner, and the inlets 17 and 24 being near the circumferential edges of the nozzle-head 26, this arrangement also leaves a suitable space for the material to be-handled and sprayed by this de-- vice outside of any mechanisms so that any chips or particles from or of the material can never This is particularly clear from the illustration in Fig. l,'in which the material 27 passes over the handle 3, and between the pipes 12 and 16, and sidewise of the mechanism-housing 25, up to the point of entering the nozzle-head 26 at 271)..

' The feeding-wheels 28 and 29 are in this improved form of device also outside of the mechanism-housing 25, so that the gears and other parts in the mechanism-housing can never be "clogged by any chips or particles from the material which could occur with older devices.

Inserting a suitable amount of grease in the mechanism-housing will keep the gears in good working order for a long time.

The heat from the nozzle is in this manner also less readily transmitted to the gear-box and even less to the handle.

While the clogging of. gears through chips and particles from the material is eliminated enof the gear-box, allowing the application of a greater pressure upon the material regardless of any chipping or dusting,that in this case has lost all effect, av still more forced and positive feeding is thereby allowed and is provided in gearing the upper'roller 29 by the extra gears 30, making the upper roller as well a feed-roller as the lower roller 28, so that the material is impinged upon opposite sides and clampedbetween rollers or wheels 28 and 29, evenly. rotating by the geared interconnection, instead of just having an idler-roller pressed against a feeder roller.

A proper feeding by the feeding roller is under these conditions always and at all times observable, and thereby checkable and easily corrected. g

The cover is hingedly connected to the main housing 25 as indicated at 25b. The upper feeding roller 29, being on a common shaft with the one of the gears 30, is mounted on the free end of the spring 31 inside of the cover 25:, thereby holding the upper roller under a suitable even tension, whereby the material 27 is held' and fed from opposite sides by the lower roller 28 and upper roller 29, a positively even feeding by the upper roller 29 with respect to the feeding by the lower roller'28- being assured by the meshed engagement bythe gears 30.

The roller-spring 31, by means of its protrud-v ing edge 32, forms-the engagement on the cover for the catch-spring 33, by which the cover is held in closed position.

Having thus described our invention, we claim:

1. In a spraying device, an encased operating mechanism, a nozzle head, a handle for holding the said encased mechanism and said head, gas

supply conduits hermetically sealed through the handle and having branches formed to partly pass gas through the encased mechanism for a motive force and partly sidewise of the encased mechanism terminating in and communicating with the said head for supplying the required gas.

mixture to the nozzle head for melting and spraying purposes and adapted to form the bracing means between the'handle and encased mechanism and head, and a feeding means protruding from the encased mechanism and operative thereby outside of and between the mechanism and the head and the handle.

2. In a spraying device of theclassdescribed, in combination with a spraying nozzle and a feeding mechanism including a driving motor,

mechanism and motor being disposed in a housing. an air conduit embedded in the walls of the housing and having .branches of which one communicates with the said motor for supply-,

ing the motive force and another of the branches passes through the housing and communicates with the said nozzle for supplying the air to mix with other gases used in the nozzle, gas supplying means communicating with the nozzle and being arranged alongside of the said housing and spaced therefrom, and feeding means operative by saidmechanism and motor and being arranged between said gas supplying means and saidhousing.

'3. In a spraying device of the class described, a housing for the operating mechanism comprising the main body and a hingedly connected top, the top having a flat spring member forming a yieldable support inside of the housing and pro truding from one edge forming an engagement,

and a spring-catch on the main body arranggad leasably closed with respect to the body.

4. In a spraying device of the class described, I

a housing comprising a main body and a hingedly connected top, the top having a spring memberprojecting inwardly with an edge-portion protruding outwardly, a catch on the body for rele'asably engaging the said edge, an operatingmechanism in the housing including shafts protruding from the housing supporting feeding rollers one yieldable with respect to the other by being mounted on said spring-member.

5. In a metal spraying device of the class described, a handle of elongated form being hollow and having a bent connection-end at the upper end with a partition-wall below and forming a mixing chamber in the bent-end, supplyconnections on the lower end of the handle, tubular conduits in the hollow of the handle and being each sealed with one end in the lower end of the handle in communication with certain of the supply connections, the opposite ends of the conduits being sealed in said partition in communication with the mixing chamber, another tubular conduit sealed with one end in the lower end of the handle in communication with another of the supply connections and with its opposite end passing through the partition sidewise of the v bent-connection-end and mixing chamber and terminating in a bent-connection, end parallel to the first-named connection-end,

whereby. extension-ends may be applied to the two connection-ends.

6. In a metal spraying device of the class described, a housing, an operating mechanism in the housing including shaft-ends protruding outwardly from the housing, and feeding rollers mounted on the shaft-ends for cooperative actu} ations and so that chips and waste from any metal fed between the rollers is free to fall away from the rollers and device adapted to eliminate a clogging of the feeding rollers and mechanism.

7. In a metal spraying device of the class described, a housing, shafts turnablyv mounted in the housing and each protruding outwardly, gears on the shafts at points in the housing for positively turning the shafts in a uniform cooperative manner, and metal-feeding rollers mounted and gears;

8. In a metal spraying device of the class described, a housing made inportions hingedly' connected, a catch on one portion, a springlatch on the other. portion to engage with the catch for holding the housing closed, an operat- 2 ing mechanism in the housing including two shafts of which the ends extend outwardly towards one side, one shaft mounted turnably in one portion, the other shaft turnably supported by the spring-latch, a gear on each of the shafts within the housing and meshed to uniformly ro-,

tate the shafts, and metal-feeding rollers mounted on the outwardly extending shaft-ends with their engaging-edges yieldably approaching one another by means of the spring-support of the one shaft and positively cooperating by means of the gears.

RUDOLPH LENSCH.

PAUL LEDER. 

